      .top-nav{
        position: relative;
      }
      .main-header {
        display: flex;
        width: 1226px;
        height: 100px;
        margin: 0 auto;
        box-sizing: border-box;
     
      }
      .main-header .wrap {
        display: flex;
        flex-direction: space-between;
        justify-content: center;
        align-items: center;
      }
      .main-header .wrap .logo {
        width: 200px;
        height: 100px;
      }
      .main-header .wrap .logo img {
        margin-top: 22.5px;
        width: 56px;
        height: 56px;
      }

      .main-header .wrap .nav-bar {
        width: 695px;
        height: 100px;
      }
      .main-header .wrap .nav-bar .item a {
        color: #333;
      }
      .main-header .wrap .nav-bar .item a:hover{
        color: #ff6700;
      }
      .main-header .wrap .nav-bar .item {
        float: left;
        font-size: 16px;
        line-height: 100px;
        padding-right: 20px;
      }

      .main-header .wrap .nav-bar .nav-list {
        position: absolute;
        width: 100%;
        height:0px;
        top: 140px;
        left: 0;
        overflow: hidden;
        transition: height 0.2s;
      }
      .main-header .wrap .nav-bar .yes-list:hover .nav-list {
        height: 255px;
        box-shadow: 0 3px 4px rgba(0, 0, 0, 0.2);
         border-top: 1px solid #e0e0e0;
      }






      .main-header .wrap .nav-bar .nav-list .item {
        width: 200px;
        height: 201px;
       padding-top: 20px;
   
     
      }
      .main-header .wrap .nav-bar .nav-list .item a{
        display: inline-block;
      }
      .main-header .wrap .nav-bar .nav-list .item .img-box{
           border-right: 1px solid #e0e0e0;
            width: 100%;
            height: 110px;
            margin: 30px 0;
           padding-right: 18px;
      }
     .main-header .wrap .nav-bar .nav-list .item .img-box.none-border{
        border-right: none;
     }

      .main-header .wrap .nav-bar .nav-list .item a>img{
        width: 160px;
        height: 110px;
      }
      .main-header .wrap .nav-bar .nav-list .item .title{
        font-size: 14px;
        color: #333;
        line-height: 14px;
        text-align: center;
        margin-top: -30px;
      }

      .main-header .wrap .nav-bar .nav-list .item .cost{
        font-size: 14px;
        color: #ff6700;
        line-height: 14px;
        text-align: center;
        margin-top: 10px;
      }

      
      

      .main-header .wrap .search-section {
        margin-left: 30px;
        width: 299px;
        height: 100px;
      }
      .main-header .wrap .search-section .search {
        padding-top: 22.5px;
        position: relative;
      }
      .main-header .wrap .search-section input {
        float: left;
        width: 244px;
        height: 50px;
        padding-left: 10px;
        outline: none;
        border: 1px solid #e0e0e0;
        border-right: none;
      }
      .main-header .wrap .search-section button {
        float: left;
        width: 55px;
        height: 50px;
        outline: none;
        border: 1px solid #e0e0e0;
        background-color: #fff;
      }
      .main-header .wrap .search-section input:hover,
      .main-header .wrap .search-section input:hover + button {
        border-color: #ff6700;
      }
      .main-header .wrap .search-section button:hover {
        background-color: #ff6700;
        border-color: #ff6700;
        color: #fff;
      }
      .main-header .wrap .search-section input:focus,
      .main-header .wrap .search-section input:focus ~ button {
        border-color: #ff6700;
      }

      .main-header .wrap .search-section {
        margin-left: 30px;
        width: 299px;
        height: 100px;
      }
      .main-header .wrap .search-section .search {
        padding-top: 22.5px;
        position: relative;
      }
      .main-header .wrap .search-section input {
        float: left;
        width: 244px;
        height: 50px;
        padding-left: 10px;
        outline: none;
        border: 1px solid #e0e0e0;
        border-right: none;
      }
      .main-header .wrap .search-section button {
        float: left;
        width: 55px;
        height: 50px;
        outline: none;
        border: 1px solid #e0e0e0;
        background-color: #fff;
      }
      .main-header .wrap .search-section input:hover,
      .main-header .wrap .search-section input:hover + button {
        border-color: #ff6700;
      }
      .main-header .wrap .search-section button:hover {
        background-color: #ff6700;
        border-color: #ff6700;
        color: #fff;
      }
      .main-header .wrap .search-section input:focus,
      .main-header .wrap .search-section input:focus ~ button {
        border-color: #ff6700;
      }

      /* 搜索框下拉列表 */
      .main-header .wrap .search-section .search-list {
        border: 1px solid #ff6700;
        position: absolute;
        top: 112.5px;
        width: 245px;
        background-color: #fff;
        font-size: 14px;
        /* border-top: none; */
        display: none;
      }
      .main-header .wrap .search-section .search-list .item {
        height: 30px;
        line-height: 30px;
      }

      .main-header .wrap .search-section input:focus + .search-list {
        display: block;
      }

      .main-header .wrap .search-section .search-list .item a {
        display: block;
        height: 30px;
        width: 245px;
        padding-left: 10px;
        color: #333;
      }
      .main-header .wrap .search-section .search-list .item a:hover {
        background-color: #e0e0e030;
      }